<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>画盒子</title>
    <style>
        .red{
            height: 100px;
            width: 200px;
            background-color: brown;
        }
        .orange{
            width: 300px;
            height: 400px;
            background-color:orange;
        }

    </style>

</head>
<body>
    <div class="red">div1</div>
    <div class="orange">div2</div>
</body>
</html>